Danube

Danube is the second longest river in Europe. It origin at southwest of Germany, through nine countries, and get into the Black Sea in the end. Danube is about 2850 kilometers, drainage area is 81.7 thousands square kilometers. Danube is very important in Europe. It has significance for immigration and political. During 20 century, Danube has big influence for trade. Also some countries made the water conservancy project, especially the part of upstream. Some countries or cities near the Danube are depended on it to improve their economy. Danube has eight different colors during the whole year. Six days are brown, fifty-five days are yellowish brown, thirty eight days are muddy green, forty nine days are light green, forty seven days are grass green, twenty four days are livid, one hundred and nine days are turquoise, and thirty seven days are dark green.